赛道设计对踱步马步态对称性的影响。
The effect of racetrack design on gait symmetry of the pacer.
作者信息
Crawford W H, Leach D H
出版信息
Can J Comp Med. 1984 Oct;48(4):374-80.
A survey of a western Canadian racetrack determined the superelevation and transition curves to be less than the cited design standards. High-speed cinematography was used to film seven Standardbred pacers as they proceeded around one curve of the track at racing speed and for each horse 19 temporal stride parameters were obtained from these films using a film analyzer system. Average velocities were calculated and the mean stride length was found to vary from 5.08 m to 5.77 m. In all frames analyzed the hind foot was observed to contact the track surface prior to the ipsilateral forefoot and all horses displayed significant (p less than 0.05) contralateral asymmetry of some temporal stride parameters. Fifteen temporal stride parameters were significantly different (p less than 0.05) when compared between horses but only three temporal stride parameters were significantly different (p less than 0.05) when their values were compared between segments of the curved portions of the track. It is suggested that temporal gait asymmetry should not be used to judge the standards of racetrack design.
对加拿大西部一条赛马跑道的调查发现，其超高和过渡曲线小于引用的设计标准。使用高速摄影技术拍摄了7匹标准马快步马以比赛速度绕赛道一个弯道行进的过程，并使用电影分析系统从这些影片中为每匹马获取了19个时间步幅参数。计算了平均速度，发现平均步幅长度在5.08米至5.77米之间变化。在所有分析的帧中，观察到后蹄在同侧前蹄之前接触跑道表面，并且所有马匹在一些时间步幅参数上表现出显著（p小于0.05）的对侧不对称。当在马匹之间进行比较时，15个时间步幅参数有显著差异（p小于0.05），但当在赛道弯道部分的不同段之间比较其值时，只有3个时间步幅参数有显著差异（p小于0.05）。建议不应使用时间步态不对称来判断赛马跑道的设计标准。
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